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TransitSwapRouterV4
- Verified, Router
- Router
Verified
The following smart contract is TransitSwapRouterV4, which is a router contract for swapping tokens across different chains. It allows users to swap tokens using different swap types and fees. The contract also supports cross-chain swaps and allows the owner to change the transit swap, transit cross, and transit fees addresses. The contract is implemented using SafeMath, ReentrancyGuard, Pausable, and various libraries.
0xb45a2dda996c32e93b8c47098e90ed0e7ab18e39
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./libraries/ReentrancyGuard.sol";
import "./libraries/RevertReasonParser.sol";
import "./libraries/TransferHelper.sol";
import "./libraries/TransitStructs.sol";
import "./libraries/Ownable.sol";
import "./libraries/Pausable.sol";
import "./libraries/SafeMath.sol";
import "./interfaces/IERC20.sol";
import "./interfaces/ITransitSwapFees.sol";
contract TransitSwapRouterV4 is Ownable, ReentrancyGuard, Pausable {
using SafeMath for uint256;
address private _transit_swap;
address private _transit_cross;
address private _transit_fees;
//default: Pre-trade fee model
mapping(uint8 => bool) private _swap_type_mode;
//whitelist wrapped
mapping(address => bool) private _wrapped_allowed;
event Receipt(address from, uint256 amount);
event Withdraw(address indexed token, address indexed executor, address indexed recipient, uint amount);
event ChangeTransitSwap(address indexed previousTransit, address indexed newTransit);
event ChangeTransitCross(address indexed previousTransit, address indexed newTransit);
event ChangeTransitFees(address indexed previousTransitFees, address indexed newTransitFees);
event ChangeSwapTypeMode(uint8[] types, bool[] newModes);
event ChangeWrappedAllowed(address[] wrappeds, bool[] newAllowed);
event TransitSwapped(address indexed srcToken, address indexed dstToken, address indexed dstReceiver, address trader, bool feeMode, uint256 amount, uint256 returnAmount, uint256 minReturnAmount, uint256 fee, uint256 toChainID, string channel, uint256 time);
constructor(address transitSwap_, address transitCross_, address transitFees_, address executor) Ownable (executor) {
_transit_swap = transitSwap_;
_transit_cross = transitCross_;
_transit_fees = transitFees_;
}
receive() external payable {
emit Receipt(msg.sender, msg.value);
}
function transitSwap() external view returns (address) {
return _transit_swap;
}
function transitCross() external view returns (address) {
return _transit_cross;
}
function transitFees() external view returns (address) {
return _transit_fees;
}
function swapTypeMode(uint8 swapType) external view returns (bool) {
return _swap_type_mode[swapType];
}
function wrappedAllowed(address wrapped) external view returns (bool) {
return _wrapped_allowed[wrapped];
}
function changeTransitSwap(address newTransit) external onlyExecutor {
address oldTransit = _transit_swap;
_transit_swap = newTransit;
emit ChangeTransitSwap(oldTransit, newTransit);
}
function changeTransitCross(address newTransit) external onlyExecutor {
address oldTransit = _transit_cross;
_transit_cross = newTransit;
emit ChangeTransitCross(oldTransit, newTransit);
}
function changeTransitFees(address newTransitFees) external onlyExecutor {
address oldTransitFees = _transit_fees;
_transit_fees = newTransitFees;
emit ChangeTransitFees(oldTransitFees, newTransitFees);
}
function changeSwapTypeMode(uint8[] memory swapTypes) external onlyExecutor {
bool[] memory newModes = new bool[](swapTypes.length);
for (uint index; index < swapTypes.length; index++) {
_swap_type_mode[swapTypes[index]] = !_swap_type_mode[swapTypes[index]];
newModes[index] = _swap_type_mode[swapTypes[index]];
}
emit ChangeSwapTypeMode(swapTypes, newModes);
}
function changeWrappedAllowed(address[] calldata wrappeds) external onlyExecutor {
bool[] memory newAllowed = new bool[](wrappeds.length);
for (uint index; index < wrappeds.length; index++) {
_wrapped_allowed[wrappeds[index]] = !_wrapped_allowed[wrappeds[index]];
newAllowed[index] = _wrapped_allowed[wrappeds[index]];
}
emit ChangeWrappedAllowed(wrappeds, newAllowed);
}
function changePause(bool paused) external onlyExecutor {
if (paused) {
_pause();
} else {
_unpause();
}
}
function _beforeSwap(bool preTradeModel, TransitStructs.TransitSwapDescription calldata desc) private returns (uint256 swapAmount, uint256 fee, uint256 beforeBalance) {
if (preTradeModel) {
fee = ITransitSwapFees(_transit_fees).getFeeRate(msg.sender, desc.amount, desc.swapType, desc.channel);
}
if (TransferHelper.isETH(desc.srcToken)) {
require(msg.value == desc.amount, "TransitSwap: invalid msg.value");
swapAmount = desc.amount.sub(fee);
} else {
if (preTradeModel) {
TransferHelper.safeTransferFrom(desc.srcToken, msg.sender, address(this), desc.amount);
TransferHelper.safeTransfer(desc.srcToken, desc.srcReceiver, desc.amount.sub(fee));
} else {
TransferHelper.safeTransferFrom(desc.srcToken, msg.sender, desc.srcReceiver, desc.amount);
}
}
if (TransferHelper.isETH(desc.dstToken)) {
if (preTradeModel) {
beforeBalance = desc.dstReceiver.balance;
} else {
if (desc.swapType == uint8(TransitStructs.SwapTypes.swap)) {
require(_wrapped_allowed[desc.wrappedNative], "TransitSwap: invalid wrapped address");
beforeBalance = IERC20(desc.wrappedNative).balanceOf(address(this));
} else {
beforeBalance = address(this).balance;
}
}
} else {
if (preTradeModel) {
beforeBalance = IERC20(desc.dstToken).balanceOf(desc.dstReceiver);
} else {
beforeBalance = IERC20(desc.dstToken).balanceOf(address(this));
}
}
}
function _afterSwap(bool preTradeModel, TransitStructs.TransitSwapDescription calldata desc, uint256 beforeBalance) private returns (uint256 returnAmount, uint256 fee) {
if (TransferHelper.isETH(desc.dstToken)) {
if (preTradeModel) {
returnAmount = desc.dstReceiver.balance.sub(beforeBalance);
require(returnAmount >= desc.minReturnAmount, "TransitSwap: insufficient return amount");
} else {
if (desc.swapType == uint8(TransitStructs.SwapTypes.swap)) {
returnAmount = IERC20(desc.wrappedNative).balanceOf(address(this)).sub(beforeBalance);
require(_wrapped_allowed[desc.wrappedNative], "TransitSwap: invalid wrapped address");
TransferHelper.safeWithdraw(desc.wrappedNative, returnAmount);
} else {
returnAmount = address(this).balance.sub(beforeBalance);
}
fee = ITransitSwapFees(_transit_fees).getFeeRate(msg.sender, returnAmount, desc.swapType, desc.channel);
returnAmount = returnAmount.sub(fee);
require(returnAmount >= desc.minReturnAmount, "TransitSwap: insufficient return amount");
TransferHelper.safeTransferETH(desc.dstReceiver, returnAmount);
}
} else {
if (preTradeModel) {
returnAmount = IERC20(desc.dstToken).balanceOf(desc.dstReceiver).sub(beforeBalance);
require(returnAmount >= desc.minReturnAmount, "TransitSwap: insufficient return amount");
} else {
returnAmount = IERC20(desc.dstToken).balanceOf(address(this)).sub(beforeBalance);
fee = ITransitSwapFees(_transit_fees).getFeeRate(msg.sender, returnAmount, desc.swapType, desc.channel);
returnAmount = returnAmount.sub(fee);
uint256 receiverBeforeBalance = IERC20(desc.dstToken).balanceOf(desc.dstReceiver);
TransferHelper.safeTransfer(desc.dstToken, desc.dstReceiver, returnAmount);
returnAmount = IERC20(desc.dstToken).balanceOf(desc.dstReceiver).sub(receiverBeforeBalance);
require(returnAmount >= desc.minReturnAmount, "TransitSwap: insufficient return amount");
}
}
}
function swap(TransitStructs.TransitSwapDescription calldata desc, TransitStructs.CallbytesDescription calldata callbytesDesc) external payable nonReentrant whenNotPaused {
require(callbytesDesc.calldatas.length > 0, "TransitSwap: data should be not zero");
require(desc.amount > 0, "TransitSwap: amount should be greater than 0");
require(desc.dstReceiver != address(0), "TransitSwap: receiver should be not address(0)");
require(desc.minReturnAmount > 0, "TransitSwap: minReturnAmount should be greater than 0");
if (callbytesDesc.flag == uint8(TransitStructs.Flag.aggregate)) {
require(desc.srcToken == callbytesDesc.srcToken, "TransitSwap: invalid callbytesDesc");
}
bool preTradeModel = !_swap_type_mode[desc.swapType];
(uint256 swapAmount, uint256 fee, uint256 beforeBalance) = _beforeSwap(preTradeModel, desc);
{
//bytes4(keccak256(bytes('callbytes(TransitStructs.CallbytesDescription)')));
(bool success, bytes memory result) = _transit_swap.call{value:swapAmount}(abi.encodeWithSelector(0xccbe4007, callbytesDesc));
if (!success) {
revert(RevertReasonParser.parse(result,"TransitSwap:"));
}
}
(uint256 returnAmount, uint256 postFee) = _afterSwap(preTradeModel, desc, beforeBalance);
if (postFee > fee) {
fee = postFee;
}
_emitTransit(desc, preTradeModel, fee, returnAmount);
}
function _beforeCross(TransitStructs.TransitSwapDescription calldata desc) private returns (uint256 swapAmount, uint256 fee, uint256 beforeBalance) {
fee = ITransitSwapFees(_transit_fees).getFeeRate(msg.sender, desc.amount, desc.swapType, desc.channel);
if (TransferHelper.isETH(desc.srcToken)) {
require(msg.value == desc.amount, "TransitSwap: invalid msg.value");
swapAmount = desc.amount.sub(fee);
} else {
beforeBalance = IERC20(desc.srcToken).balanceOf(_transit_cross);
if (fee == 0) {
TransferHelper.safeTransferFrom(desc.srcToken, msg.sender, _transit_cross, desc.amount);
} else {
TransferHelper.safeTransferFrom(desc.srcToken, msg.sender, address(this), desc.amount);
TransferHelper.safeTransfer(desc.srcToken, _transit_cross, desc.amount.sub(fee));
}
}
}
function cross(TransitStructs.TransitSwapDescription calldata desc, TransitStructs.CallbytesDescription calldata callbytesDesc) external payable nonReentrant whenNotPaused {
require(callbytesDesc.calldatas.length > 0, "TransitSwap: data should be not zero");
require(desc.amount > 0, "TransitSwap: amount should be greater than 0");
require(desc.srcToken == callbytesDesc.srcToken, "TransitSwap: invalid callbytesDesc");
(uint256 swapAmount, uint256 fee, uint256 beforeBalance) = _beforeCross(desc);
{
//bytes4(keccak256(bytes('callbytes(TransitStructs.CallbytesDescription)')));
(bool success, bytes memory result) = _transit_cross.call{value:swapAmount}(abi.encodeWithSelector(0xccbe4007, callbytesDesc));
if (!success) {
revert(RevertReasonParser.parse(result,"TransitSwap:"));
}
}
if (!TransferHelper.isETH(desc.srcToken)) {
require(IERC20(desc.srcToken).balanceOf(_transit_cross) >= beforeBalance, "TransitSwap: invalid cross");
}
_emitTransit(desc, true, fee, 0);
}
function _emitTransit(TransitStructs.TransitSwapDescription calldata desc, bool preTradeModel, uint256 fee, uint256 returnAmount) private {
emit TransitSwapped(
desc.srcToken,
desc.dstToken,
desc.dstReceiver,
msg.sender,
preTradeModel,
desc.amount,
returnAmount,
desc.minReturnAmount,
fee,
desc.toChainID,
desc.channel,
block.timestamp
);
}
function withdrawTokens(address[] memory tokens, address recipient) external onlyExecutor {
for(uint index; index < tokens.length; index++) {
uint amount;
if(TransferHelper.isETH(tokens[index])) {
amount = address(this).balance;
TransferHelper.safeTransferETH(recipient, amount);
} else {
amount = IERC20(tokens[index]).balanceOf(address(this));
TransferHelper.safeTransferWithoutRequire(tokens[index], recipient, amount);
}
emit Withdraw(tokens[index], msg.sender, recipient, amount);
}
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.6.9;
interface ITransitSwapFees {
function getFeeRate(address trader, uint256 tradeAmount, uint8 swapType, string memory channel) external view returns (uint payFees);
}// SPDX-License-Identifier: MIT
pragma solidity >=0.6.9;
interface IERC20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0;
library SafeMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, 'ds-math-add-overflow');
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, 'ds-math-sub-underflow');
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
}
function div(uint x, uint y) internal pure returns (uint z) {
require(y != 0 , 'ds-math-div-zero');
z = x / y;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
_requireNotPaused();
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
_requirePaused();
_;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Throws if the contract is paused.
*/
function _requireNotPaused() internal view virtual {
require(!paused(), "Pausable: paused");
}
/**
* @dev Throws if the contract is not paused.
*/
function _requirePaused() internal view virtual {
require(paused(), "Pausable: not paused");
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(msg.sender);
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(msg.sender);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
// Add executor extension
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable {
address private _owner;
address private _pendingOwner;
address private _executor;
address private _pendingExecutor;
bool internal _initialized;
event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
event ExecutorshipTransferStarted(address indexed previousExecutor, address indexed newExecutor);
event ExecutorshipTransferred(address indexed previousExecutor, address indexed newExecutor);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor(address newExecutor) {
require(!_initialized, "Ownable: initialized");
_transferOwnership(msg.sender);
_transferExecutorship(newExecutor);
_initialized = true;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Throws if called by any account other than the executor.
*/
modifier onlyExecutor() {
_checkExecutor();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Returns the address of the current executor.
*/
function executor() public view virtual returns (address) {
return _executor;
}
/**
* @dev Returns the address of the pending owner.
*/
function pendingOwner() public view virtual returns (address) {
return _pendingOwner;
}
/**
* @dev Returns the address of the pending executor.
*/
function pendingExecutor() public view virtual returns (address) {
return _pendingExecutor;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == msg.sender, "Ownable: caller is not the owner");
}
/**
* @dev Throws if the sender is not the executor.
*/
function _checkExecutor() internal view virtual {
require(executor() == msg.sender, "Ownable: caller is not the executor");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
_pendingOwner = newOwner;
emit OwnershipTransferStarted(owner(), newOwner);
}
/**
* @dev Transfers executorship of the contract to a new account (`newExecutor`).
* Can only be called by the current executor.
*/
function transferExecutorship(address newExecutor) public virtual onlyExecutor {
_pendingExecutor = newExecutor;
emit ExecutorshipTransferStarted(executor(), newExecutor);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
delete _pendingOwner;
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
function _transferExecutorship(address newExecutor) internal virtual {
delete _pendingExecutor;
address oldExecutor = _executor;
_executor = newExecutor;
emit ExecutorshipTransferred(oldExecutor, newExecutor);
}
function acceptOwnership() external {
address sender = msg.sender;
require(pendingOwner() == sender, "Ownable: caller is not the new owner");
_transferOwnership(sender);
}
function acceptExecutorship() external {
address sender = msg.sender;
require(pendingExecutor() == sender, "Ownable: caller is not the new executor");
_transferExecutorship(sender);
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
library TransitStructs {
enum SwapTypes {aggregatePreMode, aggregatePostMode, swap, cross}
enum Flag {aggregate, swap, cross}
struct TransitSwapDescription {
uint8 swapType;
address srcToken;
address dstToken;
address srcReceiver;
address dstReceiver;
uint256 amount;
uint256 minReturnAmount;
string channel;
uint256 toChainID;
address wrappedNative;
}
struct CallbytesDescription {
uint8 flag;
address srcToken;
bytes calldatas;
}
struct AggregateDescription {
address dstToken;
address receiver;
uint[] amounts;
uint[] needTransfer;
address[] callers;
address[] approveProxy;
bytes[] calls;
}
struct SwapDescription {
address[][] paths;
address[][] pairs;
uint[] fees;
address receiver;
uint deadline;
}
struct CrossDescription {
address caller;
uint256 amount;
bool needWrapped;
bytes calls;
}
function decodeAggregateDesc(bytes calldata calldatas) internal pure returns (AggregateDescription memory desc) {
desc = abi.decode(calldatas, (AggregateDescription));
}
function decodeSwapDesc(bytes calldata calldatas) internal pure returns (SwapDescription memory desc) {
desc = abi.decode(calldatas, (SwapDescription));
}
function decodeCrossDesc(bytes calldata calldatas) internal pure returns (CrossDescription memory desc) {
desc = abi.decode(calldatas, (CrossDescription));
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0;
library TransferHelper {
address private constant _ETH_ADDRESS = address(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);
address private constant _ZERO_ADDRESS = address(0);
function isETH(address token) internal pure returns (bool) {
return (token == _ZERO_ADDRESS || token == _ETH_ADDRESS);
}
function safeApprove(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('approve(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
}
function safeTransfer(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_TOKEN_FAILED');
}
function safeTransferWithoutRequire(address token, address to, uint256 value) internal returns (bool) {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
return (success && (data.length == 0 || abi.decode(data, (bool))));
}
function safeTransferFrom(address token, address from, address to, uint value) internal {
// bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');
}
function safeTransferETH(address to, uint value) internal {
// solium-disable-next-line
(bool success,) = to.call{value:value}(new bytes(0));
require(success, 'TransferHelper: TRANSFER_FAILED');
}
function safeDeposit(address wrapped, uint value) internal {
// bytes4(keccak256(bytes('deposit()')));
(bool success, bytes memory data) = wrapped.call{value:value}(abi.encodeWithSelector(0xd0e30db0));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: DEPOSIT_FAILED');
}
function safeWithdraw(address wrapped, uint value) internal {
// bytes4(keccak256(bytes('withdraw(uint256 wad)')));
(bool success, bytes memory data) = wrapped.call{value:0}(abi.encodeWithSelector(0x2e1a7d4d, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: WITHDRAW_FAILED');
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0;
library RevertReasonParser {
function parse(bytes memory data, string memory prefix) internal pure returns (string memory) {
// https://solidity.readthedocs.io/en/latest/control-structures.html#revert
// We assume that revert reason is abi-encoded as Error(string)
// 68 = 4-byte selector 0x08c379a0 + 32 bytes offset + 32 bytes length
if (data.length >= 68 && data[0] == "\x08" && data[1] == "\xc3" && data[2] == "\x79" && data[3] == "\xa0") {
string memory reason;
// solhint-disable no-inline-assembly
assembly {
// 68 = 32 bytes data length + 4-byte selector + 32 bytes offset
reason := add(data, 68)
}
/*
revert reason is padded up to 32 bytes with ABI encoder: Error(string)
also sometimes there is extra 32 bytes of zeros padded in the end:
https://github.com/ethereum/solidity/issues/10170
because of that we can't check for equality and instead check
that string length + extra 68 bytes is less than overall data length
*/
require(data.length >= 68 + bytes(reason).length, "Invalid revert reason");
return string(abi.encodePacked(prefix, "Error(", reason, ")"));
}
// 36 = 4-byte selector 0x4e487b71 + 32 bytes integer
else if (data.length == 36 && data[0] == "\x4e" && data[1] == "\x48" && data[2] == "\x7b" && data[3] == "\x71") {
uint256 code;
// solhint-disable no-inline-assembly
assembly {
// 36 = 32 bytes data length + 4-byte selector
code := mload(add(data, 36))
}
return string(abi.encodePacked(prefix, "Panic(", _toHex(code), ")"));
}
return string(abi.encodePacked(prefix, "Unknown(", _toHex(data), ")"));
}
function _toHex(uint256 value) private pure returns(string memory) {
return _toHex(abi.encodePacked(value));
}
function _toHex(bytes memory data) private pure returns(string memory) {
bytes16 alphabet = 0x30313233343536373839616263646566;
bytes memory str = new bytes(2 + data.length * 2);
str[0] = "0";
str[1] = "x";
for (uint256 i = 0; i < data.length; i++) {
str[2 * i + 2] = alphabet[uint8(data[i] >> 4)];
str[2 * i + 3] = alphabet[uint8(data[i] & 0x0f)];
}
return string(str);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}TransitSwapRouterV4 ABI
Copied
[{"inputs":[{"internalType":"address","name":"transitSwap_","type":"address"},{"internalType":"address","name":"transitCross_","type":"address"},{"internalType":"address","name":"transitFees_","type":"address"},{"internalType":"address","name":"executor","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8[]","name":"types","type":"uint8[]"},{"indexed":false,"internalType":"bool[]","name":"newModes","type":"bool[]"}],"name":"ChangeSwapTypeMode","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousTransit","type":"address"},{"indexed":true,"internalType":"address","name":"newTransit","type":"address"}],"name":"ChangeTransitCross","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousTransitFees","type":"address"},{"indexed":true,"internalType":"address","name":"newTransitFees","type":"address"}],"name":"ChangeTransitFees","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousTransit","type":"address"},{"indexed":true,"internalType":"address","name":"newTransit","type":"address"}],"name":"ChangeTransitSwap","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address[]","name":"wrappeds","type":"address[]"},{"indexed":false,"internalType":"bool[]","name":"newAllowed","type":"bool[]"}],"name":"ChangeWrappedAllowed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousExecutor","type":"address"},{"indexed":true,"internalType":"address","name":"newExecutor","type":"address"}],"name":"ExecutorshipTransferStarted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousExecutor","type":"address"},{"indexed":true,"internalType":"address","name":"newExecutor","type":"address"}],"name":"ExecutorshipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferStarted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"from","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Receipt","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"srcToken","type":"address"},{"indexed":true,"internalType":"address","name":"dstToken","type":"address"},{"indexed":true,"internalType":"address","name":"dstReceiver","type":"address"},{"indexed":false,"internalType":"address","name":"trader","type":"address"},{"indexed":false,"internalType":"bool","name":"feeMode","type":"bool"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"returnAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"minReturnAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"fee","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"toChainID","type":"uint256"},{"indexed":false,"internalType":"string","name":"channel","type":"string"},{"indexed":false,"internalType":"uint256","name":"time","type":"uint256"}],"name":"TransitSwapped","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":true,"internalType":"address","name":"executor","type":"address"},{"indexed":true,"internalType":"address","name":"recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[],"name":"acceptExecutorship","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"paused","type":"bool"}],"name":"changePause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint8[]","name":"swapTypes","type":"uint8[]"}],"name":"changeSwapTypeMode","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newTransit","type":"address"}],"name":"changeTransitCross","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newTransitFees","type":"address"}],"name":"changeTransitFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newTransit","type":"address"}],"name":"changeTransitSwap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"wrappeds","type":"address[]"}],"name":"changeWrappedAllowed","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"uint8","name":"swapType","type":"uint8"},{"internalType":"address","name":"srcToken","type":"address"},{"internalType":"address","name":"dstToken","type":"address"},{"internalType":"address","name":"srcReceiver","type":"address"},{"internalType":"address","name":"dstReceiver","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"minReturnAmount","type":"uint256"},{"internalType":"string","name":"channel","type":"string"},{"internalType":"uint256","name":"toChainID","type":"uint256"},{"internalType":"address","name":"wrappedNative","type":"address"}],"internalType":"struct TransitStructs.TransitSwapDescription","name":"desc","type":"tuple"},{"components":[{"internalType":"uint8","name":"flag","type":"uint8"},{"internalType":"address","name":"srcToken","type":"address"},{"internalType":"bytes","name":"calldatas","type":"bytes"}],"internalType":"struct TransitStructs.CallbytesDescription","name":"callbytesDesc","type":"tuple"}],"name":"cross","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"executor","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingExecutor","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"uint8","name":"swapType","type":"uint8"},{"internalType":"address","name":"srcToken","type":"address"},{"internalType":"address","name":"dstToken","type":"address"},{"internalType":"address","name":"srcReceiver","type":"address"},{"internalType":"address","name":"dstReceiver","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"minReturnAmount","type":"uint256"},{"internalType":"string","name":"channel","type":"string"},{"internalType":"uint256","name":"toChainID","type":"uint256"},{"internalType":"address","name":"wrappedNative","type":"address"}],"internalType":"struct TransitStructs.TransitSwapDescription","name":"desc","type":"tuple"},{"components":[{"internalType":"uint8","name":"flag","type":"uint8"},{"internalType":"address","name":"srcToken","type":"address"},{"internalType":"bytes","name":"calldatas","type":"bytes"}],"internalType":"struct TransitStructs.CallbytesDescription","name":"callbytesDesc","type":"tuple"}],"name":"swap","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint8","name":"swapType","type":"uint8"}],"name":"swapTypeMode","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newExecutor","type":"address"}],"name":"transferExecutorship","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"transitCross","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"transitFees","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"transitSwap","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"tokens","type":"address[]"},{"internalType":"address","name":"recipient","type":"address"}],"name":"withdrawTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"wrapped","type":"address"}],"name":"wrappedAllowed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]TransitSwapRouterV4 Bytecode
Copied
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